Earlier quoted context omitted.
> (...) switch to a less permissive license. License "permissiveness" is a relative concept. From the point of view of the users of your software, the GPL is more permissive than MIT, since they have permission to see the source code. If you release software under MIT or BSD licenses, you allow middlemen to strip this right to users of your software.
> you allow middlemen to strip this right to users of your software. That's not true. Somebody can take the source code and build something closed on top of it, but the original code will be already free, and you will always have the right to see it. For example, PlayStation OS is based on FreeBSD (AFAIK). They took it, adapted it and added a lot of stuff. Did you lose the right to see the source code of FreeBSD ? No…
Of course it doesn't change the original project. But when people take the codebase and build a new product on it, what GP says is absolutely the case. The devs can withhold all code and rights to it from the next user. This is most commonly an issue when it comes to libraries rather than end products, but not always.
It doesn't also have to mean that the original project dies or disappears, it can just rob from their growth potential. Examples are quite easy to find. There's been a big hullaballoo over cloud providers taking open source projects and competing with them by offering managed versions of the service that are well-integrated into their ecosystems. Economically this is also a problem because the cloud provider can then undercut the price of the managed service compared to the official one since they aren't bearing the burden of building/maintaining the codebase.
I'm by no means against "permissive" licensing (MIT, etc), I think they have their time and place just like GPL, etc, but I am against dismissing valid concerns with shallow replies.